一种基于电流分离补偿的级联型DSTATCOM及其建模与控制

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Abstract A sort of cascaded H-bridge distribution static synchronous compensator(DSTATCOM) based on current separation compensation is proposed in this paper. A three-phase 4-quadrant VSR united with the DC-side capacitor serves as the independent DC power supply for the H-bridge inverter in the power units of the DSTATCOM. Especially, the VSR provides the whole or a part of the fundamental wave positive-sequence reactive current, and contrarily, the H-bridge inverter only undertakes a part of the reactive compensation tasks besides the fundamental wave negative-sequence and harmonic currents. Thus, the compensation capacity of the DSTATCOM will get optimized distribution and the performance price ratio will also be improved. This paper, firstly introduces the mainly work principle of this device. Secondly, the energy operation rules between the DC and AC side of the power units are analyzed in detail. Moreover, the DC mathematic model is established so as to instruct the researches of the control arithmetic and circuit parameters. Then, this paper sets forth briefly the control system, and on this basis, several critical control methods are analyzed, such as reactive compensation synchronization control technology of every power units. At last, a great deal experiments are made to validate these conclusions mentioned in this paper.

Key words： Cascaded H-bridge DSTATCOM current separation compensation DC-side mathematic model synchronization control

Received: 13 December 2010 Published: 20 March 2014

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TM46

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	Xu Sheng
	Yang Zhengyu

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Xu Sheng,Yang Zhengyu. Modeling and Control of Cascaded H-Bridge DSTATCOM Based on Current Separation Compensation[J]. Transactions of China Electrotechnical Society, 2012, 27(9): 25-33.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I9/25

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